Category: Physics

What happens when air resistance is increased? The increase in speed leads to an increase in the amount of air resistance. Eventually, the force of air resistance becomes large enough to balances the force of gravity. At this instant in time, the net force is 0 Newton; the object will stop accelerating. The object is […]

Why Coriolis force is perpendicular to pressure gradient force? The Coriolis force acts perpendicular to the ‘velocity’ of the moving body. A way to visualize this is as follows: When it starts, the wind is moving exactly along the pressure gradient (red line below). Coriolis force pulls it in a perpendicular direction (green line). Now, […]

At which stage is potential energy at its minimum? The potential energy due to gravity is at a minimum, since the mass is lifted the least amount above ground. In fact, if ground level is imagined at the bottom of the motion, the potential energy due to gravity is zero at this point of the […]

What did Aristotle say about the moon? For Aristotle the moon had been a perfect sphere, and that was how people still saw it in 1609. A perfect sphere, of course, is perfectly smooth. The pure moon was not of base earth. What did ancients think of the moon? Through persistent observation, Anaxagoras came to […]

Is Russia a stage 4 country? It does not have the qualities of stage 1, high birth rates and death rates. Russia does not have declining birth rates and low death rates that would classify it as stage 3. Since it’s not stage 4 with low birth and death rates Russia could possibly be the […]

What is the force in Newtons on each load? The unit of force is the Newton (N) – where one newton is one kilogram metre per second squared. The Newton is defined as the force which, when applied to a mass of one kilogram, gives an acceleration of one meter per second squared. F = […]

What are some examples of seafloor spreading? Seafloor spreading occurs along mid-ocean ridges—large mountain ranges rising from the ocean floor. The Mid-Atlantic Ridge, for instance, separates the North American plate from the Eurasian plate, and the South American plate from the African plate. What is used to measure bathymetry? ADCPs measure water velocity by transmitting […]

What is the first step in responding to any sports injury? Explain why the first step in responding to any sports injury is to remove the danger that lead to the injury. When someone sustains an injury while participating in sports, that indicates that something unexpected has occurred. How does compression help swelling? Compression Applying […]

Which swimmer has the greatest speed? Olympic gold-medalist Michael Phelps can swim the 200-meter freestyle in approximately 1.42 minutes, which equates to a speed of about 4.7 mph (miles per hour) or 7.6 km/h (kilometers per hour). A sailfish could cover 200 meters in about 10 seconds! How fast is a swimmer? about 2 miles […]

Is it cheaper to leave AC on all day? In general, it is cheaper to leave the AC on all day during very hot temperatures. However, turning off the AC during a heat wave can quickly introduce a lot of heat and humidity into your home. After even just a couple of hours, your AC […]